Measure once, buy the right amount.
Free calculators that turn your measurements into a shopping list for concrete, gravel, roofing, decks, tile, paint, sod and more. No sign-up, works on your phone in the yard.
Why use a calculator before you buy?
Running short halfway through a job costs you a second trip, a second delivery fee, or a weak joint in fresh concrete. Over-ordering leaves you with a pallet of bags you paid for and can't return. A quick, accurate estimate avoids both.
Every calculator on Instarista shows the formula it uses and the assumptions behind it, like how much concrete is in an 80 lb bag or how much a cubic yard of gravel weighs. You can check the math yourself and adjust for the exact product you're buying.
How to measure your project
- Use a tape measure for small areas and a measuring wheel for long fence lines and driveways.
- Break odd shapes into rectangles and circles, calculate each, and add them up.
- Measure depth or thickness in a few places and use the average.
- Write measurements down as you go. Most calculators here remember your last entries on this device.